CVE-2019-19722: Null Pointer Dereference
First published: Fri Dec 13 2019(Updated: )
In Dovecot before 2.3.9.2, an attacker can crash a push-notification driver with a crafted email when push notifications are used, because of a NULL Pointer Dereference. The email must use a group address as either the sender or the recipient.
Credit: cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Dovecot Dovecot | <2.3.9.2 | |
| Fedora | =30 | |
| Fedora | =31 |
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Reference Links
- http://www.openwall.com/lists/oss-security/2019/12/13/3
- https://dovecot.org/list/dovecot-news/2019-December/000428.html
- https://dovecot.org/pipermail/dovecot-news/2019-December/000428.html
- https://dovecot.org/security.html
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/4OZCJ3RBA4WIYGN7SOV4TW2AIHXPZATK/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/6PPB7PG5BM3MC5ZF2KHQ3UR7CZIO42BB/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/4OZCJ3RBA4WIYGN7SOV4TW2AIHXPZATK/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/6PPB7PG5BM3MC5ZF2KHQ3UR7CZIO42BB/
Frequently Asked Questions
What is CVE-2019-19722?
CVE-2019-19722 is a vulnerability in Dovecot, a popular mail server, that allows an attacker to crash a push-notification driver with a crafted email.
How can an attacker exploit CVE-2019-19722?
An attacker can exploit CVE-2019-19722 by sending a crafted email with a group address as either the sender or the recipient, causing a NULL Pointer Dereference and crashing the push-notification driver.
What is the severity of CVE-2019-19722?
The severity of CVE-2019-19722 is medium, with a CVSSv3 score of 5.3.
Which software versions are affected by CVE-2019-19722?
Dovecot versions before 2.3.9.2 are affected by CVE-2019-19722. Fedora versions 30 and 31 are also affected.
How can CVE-2019-19722 be mitigated?
To mitigate CVE-2019-19722, users should update Dovecot to version 2.3.9.2 or later.
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- vendor/dovecot
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- vendor/fedoraproject
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- version/fedora/30
- version/fedora/31